it's a technology. it's not any more than that. >> reporter: along with the health concerns, critics also think the salmon could pose a risk to wild salmon population. >>> it's the season for seal pups along the california coastline, and marine mammal experts have a simple piece of advice for humans. leave them alone. mother seals leave their pups on beaches while they hunt for food. be workers at the marine mammal center say that is a sure way to drive mother seals away. >> when the humans are approaching her pups, she gets very nervous. she will not come out to reunite with her pup. she doesn't want to defend it, she gets too afraid of people. >> marine biologists say it's not just people who pose a risk, they are also urging anyone with a dog to make sure you keep the dogs under control on the beach as well. >>> despite the cloud cover out there, we had a pretty nice day out there. temperatures were mostly in the 50s. here's how the satellite loop looks. you can see some of that rain in the hills aro